Patent US3738491A successfully refreshed from Google Patents.
US2665508A
Expired / Lapsed
US
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Farm gate
Assignee: J ROBERT F SWANSON
•
Filing: 1947-08-05
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Granted: 1954-01-12
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Expires: 1967-08-05
Abstract
No abstract record available.
Inventors
- 👤 Swanson Swan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 05:52
CPC Classifications
E; E06; E06B; E06B11/00; E06B11/02; E06B11/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US580790A
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US1292248A
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US1332399A
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US1447016A
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US1619819A
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US1636571A
Cited
US1847822A
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US2426380A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-01-11 | 1957-07-13 | 1958-01-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-01-11 | 1961-07-13 | 1962-01-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-01-11 | 1965-07-13 | 1966-01-12 | $7700.00 | Window Closed / Lapsed |